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+### https://theweeklychallenge.org/blog/perl-weekly-challenge-278/
+"""
+
+Task 2: Reverse Word
+
+Submitted by: [52]Mohammad Sajid Anwar
+     __________________________________________________________________
+
+   You are given a word, $word and a character, $char.
+
+   Write a script to replace the substring up to and including $char with
+   its characters sorted alphabetically. If the $char doesn’t exist then
+   DON'T do anything.
+
+Example 1
+
+Input: $str = "challenge", $char = "e"
+Ouput: "acehllnge"
+
+Example 2
+
+Input: $str = "programming", $char = "a"
+Ouput: "agoprrmming"
+
+Example 3
+
+Input: $str = "champion", $char = "b"
+Ouput: "champion"
+     __________________________________________________________________
+
+   Last date to submit the solution 23:59 (UK Time) Sunday 21st July 2024.
+     __________________________________________________________________
+
+SO WHAT DO YOU THINK ?
+"""
+### solution by pokgopun@gmail.com
+
+def reverseWord(word, char):
+    i = word.find(char)
+    if i < 0:
+        return word
+    return "".join(sorted(word[:i+1]))+word[i+1:]
+
+import unittest
+
+class TestReverseWord(unittest.TestCase):
+    def test(self):
+        for (word,char), otpt in {
+                ("challenge", "e"): "acehllnge",
+                ("programming", "a"):"agoprrmming",
+                ("champion", "b"): "champion",
+                }.items():
+            self.assertEqual(reverseWord(word,char), otpt)
+
+unittest.main()